<?php
if(! defined('ABSPATH')){
    exit;//exit if accessed directly
}

function true_remove_trackbacks_and_author() {
    remove_post_type_support( 'travel', 'editor' );
    remove_post_type_support( 'post', 'editor' );
    remove_post_type_support( 'post', 'custom-fields' );
    remove_post_type_support( 'post', 'author' );
    remove_post_type_support( 'post', 'excerpt' );
    remove_post_type_support( 'post', 'page-attributes' );


    
    remove_post_type_support( 'page', 'editor' );
    remove_post_type_support( 'page', 'custom-fields' );
    remove_post_type_support( 'page', 'author' );
}
 
add_action( 'init', 'true_remove_trackbacks_and_author', 10 );